1. apt; fortunate, propitious. 2. convenient. Opportune,seasonable,timely refer to something that is particularly fitting or suitable for a certain time. Opportune refers to something that is well-timed and meets exactly the demands of the time or occasion: an opportune remark. Something that is seasonable is right or proper for the time or season or occasion: seasonable weather. Something that is timely occurs or is done at an appropriate time, especially in time to meet some need: timely intervention.